/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraScriptExecutionContext.h
Specialized exec context for system scripts. Allows us to better handle the added complication of Data Interfaces across different system instances.
struct FNiagaraSystemScriptExecutionContext : public [FNiagaraScriptExecutionContextBase](API\Plugins\Niagara\FNiagaraScriptExecutionContextBa-)
TArray<FExtern...
ExtFunctionInfo
TArray<FNiagar...
SystemInstances
Array of system instances the context is currently operating on.